The man who cannot wonder, who does not habitually wonder (and worship), were he President of innumerable Royal Societies, and carried the whole Mecanique Celeste and Hegel's Philosophy, and the epitome of all Laboratories and Observatories with their results, in his single head, is but a Pair of Spectacles behind which there is no Eye. Let those who have Eyes look through him, then he may be useful.

When new turns of behavior cease to appear in the life of the individual, its behavior ceases to be intelligent.

A true delineation of the smallest man is capable of interesting the greatest man.

It were a real increase of human happiness, could all young men from the age of nineteen be covered under barrels, or rendered otherwise invisible; and there left to follow their lawful studies and callings, till they emerged, sadder and wiser, at the age of twenty-five.

Friend, hast thou considered the "rugged, all-nourishing earth," as Sophocles well names her; how she feeds the sparrow on the housetop, much more her darling man?

Time has only a relative existence.

The weakest living creature, by concentrating his powers on a single object, can accomplish something. The strongest, by dispensing his over many, may fail to accomplish anything. The drop, by continually falling, bores its passage through the hardest rock. The hasty torrent rushes over it with hideous uproar, and leaves no trace behind.